v1.2.1

Summary

Patch release so live package.json and /healthz match the chef-control-01 hotfix.

• Contains squash #66 (03916957) plus this version bump (71c3cad1d).
• Do not redeploy tag v1.2.0 (15eb72dbe): that commit predates laptop-sync and would roll live back.

Publish gap

npm @groeponline/opencodex@1.2.1 is not published in this cut. Official release.yml --publish refused a pre-existing tag; CI-wait was skipped (notify-first). Deploy uses this git SHA/tag.